(CNN) -- On December 15, CNN joins forces with YouTube to host a global debate on the environmental challenges facing our planet.

The one-hour debate, hosted by CNN's Becky Anderson, will air live on CNN.com and YouTube from Copenhagen, Denmark where world leaders are meeting to form a global treaty on climate change. You can also watch the debate on CNN International from December 16.

The debate comes just days before the end of the United Nations summit on climate change where negotiators have been hard at work on a draft treaty to set limits on carbon emissions and to secure funding to help poor nations to cope with the challenges of a warming world.

It follows a special week of "Going Green" coverage on CNN to highlight the impact of climate change around the world.